SINGERS celebrating Harrow High School's centenary performed a choral cycle specially written for the occasion by a former pupil. The work, 'Voices That Should Be Heard', was composed by Bryan Kesselman and was premièred by members of the Amici Chamber Choir, the Tonic Choir and Year 7 pupils (11- to 12-year-olds) from the Gayton Road, Harrow, secondary school who were joined by special guests Jonathan Coad, from the Royal Opera, opera singer Nadine Mortimer-Smith and a live orchestra. The concerts, held at 6pm and 8pm on Saturday at the school, form part of a series of events to mark the 100th anniversary of the school and its predecessors.